哈佛医学院发生爆炸

Group 1 - An explosion occurred at Harvard Medical School, suspected to be intentional [1] - The explosion took place shortly before 3 AM on November 1, at the fourth floor of the Goldenson Building [1] - Witnesses reported seeing two individuals fleeing the scene during the explosion [1] Group 2 - The Boston Fire Department conducted a thorough search of the building and found no additional explosive devices [1]